Cylinder-boring machine.



C. S. ANDERSON.

CYLINDER BORING MACHINE.

APPLICATION FILED MAR. Ia. 1914;

1,152,59@ PatentedSept. 7, 1915.

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CYLINDER BORING MACHINE.

APPLlcATxoN FILED MAR. 18. 1914.

Patented Sept. 7, 1915.

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cnannns s.. ANDERSON, or MINNEAPOLIS, MINNESOTA.

Lisanne.

T0 alli/whom imag/concern:

Be it known that I, CHARLES SLANDERsoN, a citizen o-fzthe United States, residing'at Minneapolis, in the county. of. Hennepin and State of Minnesota, `have invented certain new and useful Improvements in Cylinder- Boring Machines; and l". do :herebyi declare thefollowing to be a full, clear, and exact description `of the invention, `suchas will enable others skilled in the artxtofwhich it appertains to make and use the same. j'

My invention has for its object tov provide an extremely simple and highly "eliicient boring machine adapted for `use to boreout engine cylinders, and to such ends, gen-v erally stated, the invention consists of the novel devices and combinations of. devices hereinafter described and defined in the claim.

Particularly, Vmy invention has for its object toprovide a cylinder boring machine of small cost, for use inrepair shops, and which may be operated either by hand or by machine power, and by the use ofwhich, old or used cylinders may be very quickly and cheaply bored out and trued up by a cutting tool, rather than by the use of a grinding machine. In practice, a grinding machine has been found very unsatisfactory for truing up engine cylinders, because the emery or carborundum dust becomes embeded in the minute poresof the cast metal, and

the line m3 :t3 on Fig. l; Fig. 4 is a section i taken on the line 004 on Fig. 1; and Fig.

5 is a section on the line x5 on Fig. 1.*

The numeral 1 indicates a cast bed-plate 'having suitable bearings 2, 3,4 and `5.

Mounted in the bearings 2, 3 and 4, for both rotary and endwise movements, is a heavy boring shaft 6, the front end of which as shown, is reduced and threaded and detach-` ably holds a tool head' that is provided with a radially adjustable cutting too1`8.

CYIfeTDEitBORING MACHINE A Speqzsivficat'921i Letters Ittttentl Application slee March is, isili. serial No. 825,547.' f

. Patented sept. 7,1915.

i lThe bearing 5 is axially alined with the shaft 6and detachably4 held therein, by a set screw 9, is 'a split or two-partbushing 10. Y `The-numeral1l indicates a feedshaft that has screw-threaded engagement .with andv exf tends through the bushing 10, and is keyed, or otherwise rigidly secured at one end to theadjacent end of the boring shaft 6.v The i threads on therfeed shaft 11 are very fine,

and in fact, are 'of the proper nene'ss or tread to give the proper advance movement tothe tool 8 when the' shafts 6 and 11 are The said given a simultaneous rotation. y shafts 6 and 11 may be given common rotation, either by hand, or by power. To

provide vfor .rotating said shafts by hand, the feed shaft 11 is provided at itsouter end with an operating crank 12 and to provide for driving said shafts by machine jpower, a beveled gear 13'is applied on the shaft6 between the bearings 3 and 4, and the hub of the said gear 13 is provided with a key 14 that works in a long longitudinal groove 15 of the boring shaft 6. A pinion i 16 meshes with the gear 13 and is secured to the inner end ofa shaft 17 journaled in a bearing 18 andprovided at its outer end with a driving pulley 19. The bearing 18 is shown as rigidly secured to and projecty ing from the bearing 3. Y

The front end of the bed-plate or frame 1 is planed true vertically, and an alining plate, or face plate, 20 is secured thereto, preferably by bolts 21 and dowel pins 22. This alining plate 20 is provided with a large circular opening 23 that is adapted to receive the` end fin y of the engine cylinder y1. It is customary to provide engine` cylinders with these fins y, but where they are not provided, the cylindersmust -be otherwise axially alined with the boring shaft 6. The said cylinders are adapted to be secured to the alining plate 20 by bolts, clamps or any of the well known devices used for such purposes. y

The use of the improved boring machine is probably obvious, but may be briefly stated as follows: When the 'cylinder is properly secured on the alining plate, the

cutting tool 8 is positioned just outside of the cylinder, ready to enter the same, and then by lrotating the shafts 6-11, by hand or by machine power, the cutting tool will be rotated and advanced spirally, so as to prol may be accomplishedisimply by loosening` lShaft 11 i f j ducethefproperboringaction. Obviously,

Lthe` kfeed l"movement automatically follows f when theshafts 6-ll are rotated, and the i j "frate of feed Amust, "of "course,v vary propor-y V 'i v5 tionateto the speed ofrotation. Otherwise stated, leach rotation of the cutting tool willy advancethe same inthe cylindera distance ,Y When the threaded bushing 10, so that" the said shaft-s: 6 and 1l maybe VAfreely drawn outward, or'

curred by-the luse .of grinding machines. z Also, thermachin'e'isof small cost, that itl.,

back.tojstartingpoint.

outl at a very much leSSbost thanv thatin-A meets the requirements` of A-sinall repair cgpies ovfthispatent may be obtained for shops, and is highly satisfactory when operated by-hand power.

What I 'claim is:

A self-contained boring machine comprising a bed frame having longitudinally spaced"axially alined bearings, a cylinder "alining plate secured to one end of said frame and having a cylinder seat located adjacent to one end member of said bearings andaXially alined therewith, a boring shaft mountedr for rotary and endwise movementsv in said bearings and Yprovidedwith a threadedvaXiallyl projecting stem, at one end, ex-

tended through the bearings at the other end yof said frame, said latterV bearing having a sectional dismountable internallythreaded bushing :normallyl anchored therein and in engagement with said threaded stem, the

y saidl boring shaft having a boring tool at Thisiimproved boring machine orftoolhas;4 beenujmadeL andsuccessfully used yand has` i been found highly efficient for the vpurposes had `in view. In fact, it hasbeenfound thatv @bythe use thereof, cylinders may be bored that end-which projects through the cylinder seat of said alining. plate, and means for rotating said boring shaft. y

In testimony whereof I aiiix my signature inpresence of two witnesses.`

CHARLES S. ANDERSON.

Witnesses:

BERNICE G. WHEELER, HARRY D'. KILGORE.

ve cents each, by addressing the Commissioner of Patents, Washington, ILC, i 

